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ER压力传感器XBP1通过破坏树突细胞平衡来控制抗瘤免疫力
Juan R Cubillos-Ruiz1, Pedro C Silberman2, Melanie R Rutkowski3
1Department of Medicine, Weill Cornell Medical College, New York, NY 10065, USA; Sandra and Edward Meyer Cancer Center, Weill Cornell Medical College, New York, NY 10065, USA.
Cell
|June 16, 2015
概括
在与瘤相关的树突细胞 (tDCs) 中XBP1的构成性激活通过损害抗瘤免疫力驱动卵巢癌. 在tDC中抑制XBP1恢复了免疫功能,并增强了抗癌反应.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 细胞应激反应的应激反应
背景情况:
- 树突细胞 (DCs) 对于启动和维持T细胞介导的抗癌免疫是至关重要的.
- 瘤经常通过损害DC功能来逃避免疫监测.
- 众所周知,内质网膜 (ER) 应激因子XBP1促进瘤生长,但其调节宿主抗瘤免疫力的作用尚不清楚.
研究的目的:
- 研究XBP1在瘤相关树突细胞 (tDCs) 中在卵巢癌 (OvCa) 进展中的作用.
- 为了确定XBP1在tDC中的激活是否会影响宿主的抗瘤免疫反应.
- 探索针对癌症免疫治疗的tDCs中的ER压力的潜力.
主要方法:
- 在与瘤相关的DC中研究了XBP1的构成性激活.
- 脂质过氧化副产品被确定为推动XBP1激活的来源.
- 在tDC中采用了DC特定的XBP1删除和纳米粒子介导的XBP1沉默.
- 评估了对T细胞支持和抗瘤反应的影响.
主要成果:
- 在tDC中构成性XBP1激活通过抑制抗瘤免疫力驱动OvCa进展.
- 激活XBP1诱导了tDCs中的甘油三合成途径,导致脂质积累和T细胞支持受损.
- 特定于DC的XBP1删除或沉默恢复了tDC免疫刺激能力.
- 这些干预措施引起了保护性1型抗瘤反应和延长生存时间.
结论:
- 针对ER应激反应,特别是DC中的XBP1,可以同时抑制瘤生长并增强抗癌免疫力.
- 这种双重行动为癌症免疫治疗提供了一个新的治疗策略.
- 通过ER应激通路调节DC中的脂质代谢对于有效的抗瘤免疫反应至关重要.
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